56221763137 has 2 divisors, whose sum is σ = 56221763138. Its totient is φ = 56221763136.

The previous prime is 56221763077. The next prime is 56221763159. The reversal of 56221763137 is 73136712265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38200311601 + 18021451536 = 195449^2 + 134244^2 .

It is a cyclic number.

It is not a de Polignac number, because 56221763137 - 2³¹ = 54074279489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56221763093 and 56221763102.

It is not a weakly prime, because it can be changed into another prime (56221763737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28110881568 + 28110881569.

It is an arithmetic number, because the mean of its divisors is an integer number (28110881569).

Almost surely, 2^56221763137 is an apocalyptic number.

It is an amenable number.

56221763137 is a deficient number, since it is larger than the sum of its proper divisors (1).

56221763137 is an equidigital number, since it uses as much as digits as its factorization.

56221763137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 43.

The spelling of 56221763137 in words is "fifty-six billion, two hundred twenty-one million, seven hundred sixty-three thousand, one hundred thirty-seven".